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1. 发明申请

US20140347132A1 POWER AMPLIFIER APPARATUS, TRANSMITTER APPARATUS, AND METHOD OF CONTROLLING THE POWER AMPLIFIER APPARATUS 有权
标题翻译：功率放大器装置，发射器装置和控制功率放大器装置的方法
公开(公告)号：US20140347132A1
公开(公告)日：2014-11-27
申请号：US14281692
申请日：2014-05-19
申请人： FUJITSU LIMITED
发明人： Toshio KAWASAKI , Hiroyoshi Ishikawa , Kazuo Nagatani , Yuichi Utsunomiya , Alexander Nikolaevich Lozhkin , Hajime Hamada
IPC分类号： H03F1/32 , H03F3/21
CPC分类号： H03F1/3247 , H03F3/21 , H03F3/24 , H03F2201/3227 , H03F2203/21
摘要： A power amplifier apparatus includes an amplifier configured to amplify an input signal converted into an analog signal, a distortion compensator circuitry configured to perform a pre-distortion process to an input signal at a second sampling rate higher than a first sampling rate at which the input signal is converted into an analog signal, a remover configured to remove a frequency component exceeding a frequency band corresponding to the first sampling rate from the input signal subjected to the pre-distortion process, a first rate converter configured to convert a sampling rate of the input signal from which the frequency component is removed from the second sampling rate to the first sampling rate, and a first signal converter configured to convert the input signal the sampling rate of which is converted into an analog signal at the first sampling rate to supply the input signal converted into the analog signal to the amplifier.
摘要翻译：功率放大器装置包括：放大器，被配置为放大转换成模拟信号的输入信号;失真补偿器电路，被配置为以高于所述输入的第一采样率的第二采样率对输入信号执行预失真处理信号被转换为模拟信号，去除器被配置为从经过预失真处理的输入信号中去除超过与第一采样率相对应的频带的频率分量;第一速率转换器，被配置为将采样速率将频率分量从第二采样率移除到第一采样率的第一信号转换器;以及第一信号转换器，其被配置为将其采样速率被转换为模拟信号的输入信号以第一采样率转换以提供输入信号转换成模拟信号到放大器。

2. 发明申请

US20190356346A1 DISTORTION COMPENSATION DEVICE AND DISTORTION COMPENSATION METHOD 审中-公开
公开(公告)号：US20190356346A1
公开(公告)日：2019-11-21
申请号：US16295794
申请日：2019-03-07
申请人： FUJITSU LIMITED
发明人： Toshio KAWASAKI
IPC分类号： H04B1/04 , H04B1/62
摘要： A distortion compensation device includes an electric power amplifier that amplifies a transmission signal, and a processor that executes a process including: first identifying, by using a series that includes a plurality of coefficients or by using a look-up table that stores therein distortion compensation coefficients, an inverse characteristic of nonlinear distortion generated in the transmission signal in the electric power amplifier; second identifying, by using a plurality of coefficients, an inverse characteristic of linear distortion generated in the transmission signal in the electric power amplifier; and setting the coefficients for the first identifying and the second identifying such that a coefficient of a term with a degree of 1 in the series used in the first identifying or a sum of the plurality of coefficients used in the second identifying is a constant.

3. 发明申请

US20190356345A1 DISTORTION COMPENSATION DEVICE AND DISTORTION COMPENSATION METHOD 审中-公开
公开(公告)号：US20190356345A1
公开(公告)日：2019-11-21
申请号：US16285009
申请日：2019-02-25
申请人： FUJITSU LIMITED
发明人： Tomoya OTA , Toshio KAWASAKI
IPC分类号： H04B1/04
摘要： A distortion compensation device includes a generating unit, a calculation unit, a conversion unit, and a distortion compensation unit. The generating unit generates, from an output signal of a power amplifying unit that amplifies transmission signals having a plurality of different bands, a superimposed signal in which the transmission signals having the different bands have been superimposed. The calculation unit calculates, based on the superimposed signal, a coefficient indicating a forward characteristic of nonlinear distortion of the power amplifying unit associated with each of the transmission signals having the different bands. The conversion unit converts the coefficient calculated by the first calculation unit to a coefficient indicating an inverse characteristic of the nonlinear distortion of the power amplifying unit. The distortion compensation unit performs, by using the coefficients converted by the first conversion unit, a predistortion process on each of the transmission signals having different bands.

4. 发明申请

US20140285276A1 MODULATING DEVICE AND MODULATION METHOD 有权
标题翻译：调制装置和调制方法
公开(公告)号：US20140285276A1
公开(公告)日：2014-09-25
申请号：US14220776
申请日：2014-03-20
申请人： FUJITSU LIMITED
发明人： Toshio KAWASAKI
IPC分类号： H03C5/00
CPC分类号： H03C5/00 , H03C3/00 , H03C3/02 , H03C2200/0041 , H03C2200/0058 , H04L25/067 , H04L27/20 , H04L27/206
摘要： A modulating device including: a first convertor configured to generate a converted analog signal by analog conversion on a input digital signal, a modulator configured to generate a modulated signal by quadrature modulation, a phase shifter configured to generate a phase shift signal by phase rotation, a demodulator configured to generate a demodulated signal by quadrature demodulation, a second convertor to generate a converted digital signal by digital conversion, a calculating circuit configured to estimate a the first direct current offset based on the input digital signal and the converted digital signal, the first direct current offset being a noise of digital current component generated between the input digital signal inputted to the first convertor and the output signal inputted to the demodulator, and a correcting circuit configured to correct at least one among from the input digital signal to the output signal based on the first direct current offset.
摘要翻译：一种调制装置，包括：第一转换器，被配置为通过对输入数字信号进行模拟转换来生成转换的模拟信号;调制器，被配置为通过正交调制生成调制信号;移相器，被配置为通过相位旋转产生相移信号; 解调器，被配置为通过正交解调产生解调信号，第二转换器通过数字转换产生转换的数字信号;计算电路，被配置为基于所输入的数字信号和转换的数字信号来估计第一直流偏移，第一直流偏移是在输入到第一转换器的输入数字信号与输入到解调器的输出信号之间产生的数字电流分量的噪声，以及校正电路，被配置为校正输入数字信号与输出之间的至少一个信号基于第一直流偏移。

5. 发明申请

US20140197885A1 AMPLIFYING DEVICE, DISTORTION COMPENSATING DEVICE, AND AMPLIFYING METHOD 有权
标题翻译：放大装置，失真补偿装置和放大方法
公开(公告)号：US20140197885A1
公开(公告)日：2014-07-17
申请号：US14156203
申请日：2014-01-15
申请人： FUJITSU LIMITED
发明人： Nobukazu FUDABA , Hiroyoshi ISHIKAWA , Yuichi UTSUNOMIYA , Toshio KAWASAKI , Kazuo NAGATANI
IPC分类号： H03F1/32
CPC分类号： H03F1/3247 , H03F2201/3221
摘要： An amplifying device including: a first amplifier configured to generate a first output signal by amplifying an input signal, a second amplifier configured to generate a second output signal by amplifying the first output signal, and a processor configured to perform a first compensation by compensating a distortion for the second amplifier in accordance with the first output signal and the second output signal.
摘要翻译：一种放大装置，包括：第一放大器，被配置为通过放大输入信号来产生第一输出信号;第二放大器，被配置为通过放大第一输出信号来产生第二输出信号;以及处理器，被配置为通过补偿第根据第一输出信号和第二输出信号，第二放大器的失真。

6. 发明申请

US20160380668A1 COMMUNICATION DEVICE AND RECEIVING METHOD 审中-公开
标题翻译：通信设备和接收方法
公开(公告)号：US20160380668A1
公开(公告)日：2016-12-29
申请号：US15178269
申请日：2016-06-09
申请人： FUJITSU LIMITED
发明人： Nobuhisa AOKI , Toshio KAWASAKI , Toru MANIWA , Tadahiro SATO , Yusuke TOBISU , Akifumi ADACHI , Eizou ISHIZU
IPC分类号： H04B1/50 , H04L5/14
CPC分类号： H04B1/50 , H04B1/525 , H04L5/143
摘要： A communication device includes a sending unit that sends a plurality of signals that are to be wirelessly sent with different frequencies; an acquiring unit that acquires a reception signal to which an intermodulation signal that is produced due to intermodulation of the plurality of signals is added; and a processor that is connected to the sending unit and the acquiring unit. The processor generates, on the basis of the plurality of signals sent by the sending unit, a cancellation signal corresponding to the intermodulation signal and combines the generated cancellation signal with the reception signal acquired by the acquiring unit.
摘要翻译：通信装置包括发送单元，发送要以不同频率无线发送的多个信号; 获取单元，其获取由于所述多个信号的互调而产生的互调信号的接收信号; 以及连接到发送单元和获取单元的处理器。处理器基于由发送单元发送的多个信号生成对应于互调信号的消除信号，并将所生成的消除信号与由获取单元获取的接收信号组合。

7. 发明申请

US20140167844A1 DISTORTION COMPENSATION DEVICE AND DISTORTION COMPENSATION METHOD 有权
标题翻译：失真补偿装置和失真补偿方法
公开(公告)号：US20140167844A1
公开(公告)日：2014-06-19
申请号：US14056235
申请日：2013-10-17
申请人： FUJITSU LIMITED
发明人： Yuichi UTSUNOMIYA , Hiroyoshi ISHIKAWA , Toshio KAWASAKI , Alexander Nikolaevich LOZHKIN , Kazuo NAGATANI
IPC分类号： H03F1/32
CPC分类号： H03F1/3247 , H03F3/24
摘要： A distortion compensation device includes: a distortion compensator configured to output, to a power amplifier, a predistortion signal obtained by performing distortion compensation processing on a transmission signal by using a distortion compensation coefficient, wherein the distortion compensator limits bands of a reference signal and a feedback signal so that the bands fall in a pass band and updates the distortion compensation coefficient based on an error between the reference signal and the feedback signal, the reference signal corresponding to the predistortion signal, the feedback signal corresponding to an output feedback of the power amplifier.
摘要翻译：失真补偿装置包括：失真补偿器，被配置为通过使用失真补偿系数向功率放大器输出通过对发送信号执行失真补偿处理而获得的预失真信号，其中所述失真补偿器限制参考信号的频带和反馈信号，使得频带落在通带中，并且基于参考信号和反馈信号之间的误差来更新失真补偿系数，对应于预失真信号的参考信号，对应于功率的输出反馈的反馈信号放大器

8. 发明申请

US20130335140A1 AMPLIFICATION DEVICE AND AMPLIFICATION METHOD 有权
标题翻译：放大器件和放大方法
公开(公告)号：US20130335140A1
公开(公告)日：2013-12-19
申请号：US13874845
申请日：2013-05-01
申请人： FUJITSU LIMITED
发明人： Toshio KAWASAKI
IPC分类号： H03F1/42
CPC分类号： H03F1/42 , H03F1/0294 , H03F1/3247 , H03F3/24
摘要： An amplification device includes a first filter configured to pass a predetermined frequency component of a first digital signal phase-modulated with a constant amplitude; a first distortion compensator configured to compensate the signal output from the first filter in advance for distortion occurring in an amplified signal, based on a first distortion compensation coefficient dependent on an amplitude of the signal output from the first filter; a first converter configured to convert the signal compensated by the first distortion compensator into a first analog signal; and a first amplifier configured to amplify the first analog signal.
摘要翻译：放大装置包括：第一滤波器，被配置为传递以恒定幅度相位调制的第一数字信号的预定频率分量; 第一失真补偿器，被配置为基于取决于从第一滤波器输出的信号的幅度的第一失真补偿系数，预先补偿来自第一滤波器的信号从放大信号中发生的失真; 第一转换器，被配置为将由第一失真补偿器补偿的信号转换为第一模拟信号; 以及第一放大器，被配置为放大第一模拟信号。

9. 发明申请

US20180278343A1 DISTORTION COMPENSATION APPARATUS AND DISTORTION COMPENSATION METHOD 审中-公开
公开(公告)号：US20180278343A1
公开(公告)日：2018-09-27
申请号：US15905313
申请日：2018-02-26
申请人： FUJITSU LIMITED
发明人： Tomoya OTA , Toshio KAWASAKI
IPC分类号： H04B15/00
CPC分类号： H04B15/00 , H04B1/0475 , H04B2001/0425
摘要： A distortion compensation apparatus includes: a generation unit that generates a first signal to be used on a transmission side and a feedback side in common; a conversion unit that converts a frequency of a third signal that is to be an even-order distortion compensation signal by using a second signal that is based on the first signal; and a compensation unit that compensates an even-order distortion in a transmission signal caused by amplification by using a signal obtained by frequency conversion for the third signal by the conversion unit.

10. 发明申请

US20180175808A1 DISTORTION COMPENSATION APPARATUS AND DISTORTION COMPENSATION METHOD 审中-公开
公开(公告)号：US20180175808A1
公开(公告)日：2018-06-21
申请号：US15802151
申请日：2017-11-02
申请人： FUJITSU LIMITED
发明人： Tomoya OTA , Toshio KAWASAKI
IPC分类号： H03F1/32 , H03F3/24 , H04B1/04
CPC分类号： H03F1/3247 , H03F1/3223 , H03F3/189 , H03F3/24 , H03F2200/321 , H03F2200/451 , H03F2201/3224 , H04B1/0475 , H04B2001/0425
摘要： A distortion compensation apparatus include: a feedback unit that generates a feedback signal containing a first frequency component in which a plurality of odd-order distortions are superimposed and a second frequency component in which a plurality of even-order distortions are superimposed according to output of a power amplifier which amplifies a transmission signal; and a signal processor that separates the first frequency component and the second frequency component from the generated feedback signal and performs signal processing.

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